Continental Drift Theory and its evidence

Q: What is the main idea of the Continental Drift Theory?

Continents have moved over time According to this theory continents were once joined and later separated. Exam tip: drifting continents are its main idea.

Q: According to Wegener what was the large combined landmass of all continents called?

Pangaea The direct answer is A: Pangaea. Wegener proposed that the present continents were once joined into one enormous supercontinent called Pangaea. Later, this landmass broke apart and its pieces gradually moved to their current positions. Therefore the reasoning is: all continents together → one large combined landmass → name Pangaea. A is correct. B, Panthalassa, was the vast ocean surrounding Pangaea, not the landmass itself. C, Tethys, was an ancient sea between major continental blocks, not the complete supercontinent. D, Atlantic, is a present-day ocean between the Americas and Europe-Africa, so it cannot be the name of all joined continents. Memory cue: Pangaea means the supercontinent; Panthalassa means the surrounding super-ocean.

Q: According to Wegener what was the ocean surrounding Pangaea called?

Panthalassa The vast ocean around Pangaea was called Panthalassa. Exam tip: remember the pair Pangaea and Panthalassa.

Q: In the Continental Drift Theory the Tethys Sea was considered to lie between which landmasses?

Between Laurasia and Gondwanaland The Tethys Sea was considered between Laurasia and Gondwanaland. Exam tip: place Tethys between these two landmasses.

Q: What was the northern part of Pangaea called?

Laurasia Pangaea was the ancient supercontinent that later broke into major northern and southern landmasses. The northern part is generally called Laurasia, while the southern part is called Gondwanaland or Gondwana. These names help explain the large-scale movement of continents and the later formation of the continents seen today. Panthalassa was the vast ocean surrounding Pangaea, and Tethys was a sea between its major land divisions. Option B, Laurasia, is therefore correct. Gondwanaland refers to the southern part, so option A gives the opposite region. Panthalassa was not a landmass at all, making option C unsuitable. Tethys was an intervening sea, not the name of the northern continental block. Remembering north as Laurasia and south as Gondwana prevents this common confusion.

Q: What was the southern part of Pangaea called?

Gondwanaland The southern part of Pangaea was called Gondwanaland. Exam tip: remember Gondwanaland for the southern part.

Q: The matching coasts of South America and Africa are related to which evidence?

Jigsaw fit evidence The direct answer is A: jigsaw-fit evidence. The coastlines of South America and Africa appear to match like pieces of a puzzle, especially when their continental shelves are considered rather than only the modern beach lines. This observation supported Wegener’s continental-drift theory: if coastlines fit, the continents may once have been joined and later separated. A is correct because it names the shape and matching-coast evidence. B, volcanic evidence, would involve volcanoes or volcanic rocks, not the outline of coasts. C, atmospheric evidence, concerns air and climate, not continental shape. D, seismic-wave evidence, concerns earthquake-wave travel through Earth, not this visual fit. The fit alone is not the only proof, but it is an important clue. Memory cue: South America plus Africa looks like two jigsaw pieces.

Q: What does the occurrence of similar fossils support in Continental Drift?

Continents may have been joined earlier Similar fossils on distant continents indicate past connection. Exam tip: fossil evidence is an important support.

Q: Mesosaurus fossil is a common example of which evidence?

Fossil evidence Correct answer: B, fossil evidence. Mesosaurus was a freshwater reptile, and related fossils were found in parts of South America and Africa that are now separated by the Atlantic Ocean. The presence of similar fossils on different continents supports the idea that these landmasses were once connected or much closer together, as proposed in continental drift discussions. A is wrong because climatic evidence concerns matching signs of ancient climates, such as glacial deposits in regions that are warm today. C would involve similarities in rocks or minerals, not animal remains. D is too broad and does not identify the specific type of evidence in the question. Memory cue: Mesosaurus means “same fossil on separated lands”—therefore fossil evidence.

Q: Fossils of Glossopteris plant support which theory?

Continental Drift Theory Glossopteris fossils were found on several southern continents. Exam tip: link it with Gondwanaland.

01What is the main idea of the Continental Drift Theory?

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Answer and explanation

Correct answer: B. Continents have moved over time

According to this theory continents were once joined and later separated. Exam tip: drifting continents are its main idea.

Practice questions

01What is the main idea of the Continental Drift Theory?महाद्वीपीय विस्थापन सिद्धांत का मुख्य विचार क्या है?

02According to Wegener what was the large combined landmass of all continents called?वेगेनर के अनुसार सभी महाद्वीपों का विशाल संयुक्त भूभाग क्या कहलाता था?

03According to Wegener what was the ocean surrounding Pangaea called?वेगेनर के अनुसार पैंजिया को चारों ओर से घेरने वाला महासागर क्या कहलाता था?

04In the Continental Drift Theory the Tethys Sea was considered to lie between which landmasses?महाद्वीपीय विस्थापन सिद्धांत में टेथिस सागर किसके बीच स्थित माना गया?

05What was the northern part of Pangaea called?पैंजिया के उत्तरी भाग को क्या कहा गया?

06What was the southern part of Pangaea called?पैंजिया के दक्षिणी भाग को क्या कहा गया?

07The matching coasts of South America and Africa are related to which evidence?दक्षिण अमेरिका और अफ्रीका के तटों का मेल किस प्रमाण से जुड़ा है?

08What does the occurrence of similar fossils support in Continental Drift?महाद्वीपीय विस्थापन के समर्थन में समान जीवाश्मों का मिलना क्या बताता है?

09Mesosaurus fossil is a common example of which evidence?मेसोसॉरस जीवाश्म किस प्रमाण का सामान्य उदाहरण है?

10Fossils of Glossopteris plant support which theory?ग्लॉसोप्टेरिस पौधे के जीवाश्म किस सिद्धांत को समर्थन देते हैं?

11What does the occurrence of similar rock structures on different continents indicate?समान शैल संरचनाओं का विभिन्न महाद्वीपों पर मिलना किस बात का संकेत है?

12The matching coasts of Africa and South America are seen on both sides of which ocean?अफ्रीका और दक्षिण अमेरिका के तटों का मेल किस महासागर के दोनों ओर देखा जाता है?

13Tillite deposits are considered which evidence of Continental Drift?तिलाइट जमाव महाद्वीपीय विस्थापन का कौन सा प्रमाण माना जाता है?

14What does the same direction of old glacial striations on several continents show?पुरानी हिमानी धारियों का कई महाद्वीपों पर एक जैसी दिशा में मिलना क्या दर्शाता है?

15Which force did Wegener suggest for continental drift?वेगेनर ने महाद्वीपीय विस्थापन के लिए कौन सा बल सुझाया था?

16What was the main weakness of Wegener's theory?वेगेनर के सिद्धांत की मुख्य कमी क्या थी?

17In Continental Drift Theory what was assumed about the movement of continents?महाद्वीपीय विस्थापन सिद्धांत में महाद्वीपों की गति को क्या माना गया?

18Similarity of placer deposits belongs to which type of evidence?प्लेसर निक्षेपों की समानता किस प्रकार के प्रमाण में आती है?

19India was considered part of which old southern landmass?भारत किस पुराने दक्षिणी भूभाग का भाग माना गया?

20What does the occurrence of coal in Antarctica indicate?अंटार्कटिका में कोयला मिलने से कौन सा संकेत मिलता है?

21The Continental Drift Theory tries to explain which type of change?महाद्वीपीय विस्थापन सिद्धांत किस प्रकार के परिवर्तन को समझाने की कोशिश करता है?

22Which example among Continental Drift evidences is related to fossils?महाद्वीपीय विस्थापन के प्रमाणों में कौन सा उदाहरण जीवाश्म से संबंधित है?

23Which statement is correct in the Continental Drift Theory?महाद्वीपीय विस्थापन सिद्धांत में कौन सा कथन सही है?

24Which later development gave more scientific basis to Wegener's idea?वेगेनर के सिद्धांत को किसने बाद में अधिक वैज्ञानिक आधार दिया?

25Which landmasses are mainly considered part of Laurasia?लॉरेशिया में मुख्य रूप से कौन से भूभाग शामिल माने जाते हैं?

Analytics choices

01What is the main idea of the Continental Drift Theory?

02According to Wegener what was the large combined landmass of all continents called?

03According to Wegener what was the ocean surrounding Pangaea called?

04In the Continental Drift Theory the Tethys Sea was considered to lie between which landmasses?

05What was the northern part of Pangaea called?

06What was the southern part of Pangaea called?

07The matching coasts of South America and Africa are related to which evidence?

08What does the occurrence of similar fossils support in Continental Drift?

09Mesosaurus fossil is a common example of which evidence?

10Fossils of Glossopteris plant support which theory?

11What does the occurrence of similar rock structures on different continents indicate?

12The matching coasts of Africa and South America are seen on both sides of which ocean?

13Tillite deposits are considered which evidence of Continental Drift?

14What does the same direction of old glacial striations on several continents show?

15Which force did Wegener suggest for continental drift?

16What was the main weakness of Wegener's theory?

17In Continental Drift Theory what was assumed about the movement of continents?

18Similarity of placer deposits belongs to which type of evidence?

19India was considered part of which old southern landmass?

20What does the occurrence of coal in Antarctica indicate?

21The Continental Drift Theory tries to explain which type of change?

22Which example among Continental Drift evidences is related to fossils?

23Which statement is correct in the Continental Drift Theory?

24Which later development gave more scientific basis to Wegener's idea?

25Which landmasses are mainly considered part of Laurasia?